Source : Webster's Revised Unabridged Dictionary (1913)

Individuation \In`di*vid`u*a"tion\, n. [Cf. F. individuation.]
   The act of individuating or state of being individuated;
   individualization. --H. Spencer.

Source : WordNet®

individuation
     n 1: discriminating the individual from the generic group or
          species [syn: {individualization}, {individualisation}]
     2: the quality of being individual; "so absorbed by the
        movement that she lost all sense of individuality" [syn: {individuality},
         {individualism}] [ant: {commonality}]